#include <iostream>
#include <string>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <cstdlib>
#include <arpa/inet.h>
#include <cstring>
#include <netinet/in.h>
#include <unordered_map>

using namespace std;

class User
{
public:
    User(const string &ip,const uint16_t &port)
        :_ip(ip)
        ,_port(port)
    {}
    string ip() {return _ip;}
    uint16_t port() {return _port;}
    ~User()
    {}
private:
    string _ip;
    uint16_t _port;
};

class OnlineUser   
{
public:
    OnlineUser()
    {}
    void addUser(const string &ip,const uint16_t &port)
    {
        string id = ip + "-" + to_string(port);
        users.insert(make_pair(id,User(ip,port)));
    }

    void delUser(const string &ip,const uint16_t &port)
    {
        string id = ip + "-" + to_string(port); 
        users.erase(id);
    }

    bool isOnline(const string &ip,const uint16_t &port)
    {
        string id = ip + "-" + to_string(port); 
        return users.find(id) == users.end() ? false : true;
    }

    void broadcastMessage(int sockfd,const string &ip,const uint16_t &port,const string &message)
    {
        for(auto &user:users)
        {
            struct sockaddr_in client;
            bzero(&client,sizeof(client));

            client.sin_addr.s_addr = inet_addr(user.second.ip().c_str());
            client.sin_family = AF_INET;
            client.sin_port = htons(user.second.port()); 

            string s = ip + "-" + to_string(port) + "#";
            s += message;   
            sendto(sockfd,s.c_str(),s.size(),0,(struct sockaddr*)&client,sizeof(client));

        }
    }

    ~OnlineUser()
    {}
private:
    unordered_map<string,User> users;
};